Parchmentized paper



United States Patent 3,108,847 PARCHMENTIZED PAPER Edward L. Taylor, Kalamazoo, Mieh., assignor, by mesne assignmenm, to KVP Sutherland Paper Company, Kalamazoo, Mich, a corporation of Delaware Filed Mar. 24, 1953, Ser. No. 723,316 Claims. (Cl. 8119) This invention relates to a parchmentized paper having predetermined areas thereof which simulate water marks in appearance. The main objects of this invention are:

First, to provide a parchmentized paper which is parchmentized throughout but has certain areas thereof which simulate water marks in appearance, but may be purely a matter of ornamentation so far as design or outline is concerned.

Second, to provide a method of producing parchmentized paper having predetermined areas thereof of predetermined design which are parchmentized to a degree substantially difiering from the degree of parchmentization of the surrounding areas so thatisuch predetermined areas stand out or are distinctive from the surrounding areas.

Third, toprovide a method of producing parchmentized paper having the aforesaid characteristics which may be produced at parchmentizing speeds now practiced and with relatively minor additions to a combined paper and parchmentizing apparatus and a method which may be practiced at relatively little cost over the parchmentizing of paper as now practiced.

Objects relating to details and economies of the invention will appear from the description to follow. The invention is defined and pointed out in the claims.

A preferred embodiment of the invention is illustrated in the accompanying drawing, in which:

FIG. 1 is a diagrammatic view of an apparatus which may be used in the practicing of the method of my invention and in the production of the product thereof.

FIG. 2 is a conventionalized plan view of a strip of paper conventionally illustrating the product.

FIG. 3 is a greatly enlarged sectional view on a line corresponding to line 33 of PEG. 2.

It should be understood that while the accompanying drawing is mainly diagrammatic, it does represent means in their relative relation to each other which may be used in the practice of the method and the production of the product of my invention.

In the accompanying drawing 1 represents a paper making machine, 2 guide rollers for the web of paper 3 as it leaves the machine. Between the paper making machine and the parchmentizing of the web, the web is in efiect printed with a parchmentizing solution in predetermined design and spacing thereof. The design may be such as to result in simulating a water mark or it may be purely ornamental.

In the accompanying drawing a printing cylinder is indicated at 4. The printing solution may desirably be of the sulfuric acid type of the order of 45 B6. to 62 B. e web is supported in opposed relation to the printing cylinder 4 by the supporting cylinder or roller 5. 6 represents a tank for the parchmentizing printing solution, 7 a feed roller and 8 a transfer roller coacting with the feed roller and the cylinder 4.

At the rear of the printing cylinder and closely adjacent thereto is a parchmentizing apparatus conventionally illustrated as consisting of the tank 9 and the web supporting rollers 10. The p-archmentizing solution may desirably be of the sulfuric acid type and the same solution may be used as in the printing. After passing through the parchmentizing solution, the web is promptly washed and the means for doing that illustrated com- Bdddfid? Patented Oct. 29, 1963 "ice prise the tank 11 and guide rollers 12. In practice the Washed web is promptly dried, a drying apparatus being indicated at 13. The web can then be wound into a roll 14. i

In FIGS. 2 and 3 I have conventionally illustrated the product, the sheet or web being indicated at 15 with the design areas being conventionally illustrated at 16. These are shown in the form of circles, but it should be understood that they may be of a design to identify a person or concern as is common with water marks on unparchmentized types of paper. FIG. 3 is a cross section on a line corresponding to line 3--3 of BIG. 2. It will be understood that none of these figures are made to scale and as a matter of fact the paper may vary substantially in thickness as is common in widely used commercial parchmentized paper.

The paper of my invention is parchmentized throughout, the distinctive areas varying in degree of parchmentizing from the surrounding areas so that they stand out and produce the effect of water marks which, as stated, may vary greatly in design and area and spacing.

Any paper stock may be used which is adapted for effective parchmentizing and there are no weakened or unparchmentized zones. While paper as commonly produced does vary in strength, the parchmentizing adds greatly to the strength of the paper. One of the desirable features of the invention is that the paper of my invention may be produced with relatively small additional cost over regular parchmentize paper and the apparatus requires little supervision.

A sulfuric acid parchmentizing solution of the order n is described because of the fact that sulfuric acid parchmentizing solution may be used in the parchmentizing tank. The parchmentizing solution printed upon the web acts very promptly and a substantial degree of parchmentizing occurs before the web is immersed in the solution in the parchmentizing tank. This results in the distinctive areas.

A further advantage of the method is that it is not necessary to reduce the ordinary parchmentizing speeds which may relate to the paper production speeds in a set up or assembly such as illustrated in the accompanying drawing. While various apparatus might be used to practice the applicants method and to produce the applicants product, the applicant has diagrammatically illustrated and described his method in connection with the paper making machine, as the applicant considers that to be the most practical from the economy angle, and it is quite a general practice to parchmentize paper as it is discharged from a paper making machine. Iowever, it is believed that this disclosure will enable those skilled in the art of paper making and the art of parchmentizing of paper to practice my invention as may be desired for particular conditions.

Having thus described the invention, what is claimed as new and desired to secure by letters Patent is:

1. The method of producing parchmentized paper having areas thereof simulating water-marks, comprising the steps of translating a web of paper formed of parchmentizable fibers, applying to spaced portions of the web while it is being translated and ina predetermined design a parchmentizin-g solution of sulfuric acid of the order of 45 B6. to 62 36. and after substantial parch mentizing of the fibers has taken place in the areas to which the parchmentizing solution is applied but before complete parchmentizing of the fibers of such areas, submergingly translating the web of paper through a parch- 3 mentizing solution of sulfuric acid, and washing and drying the web or" paper as it is being translated.

2. The method of producing parchmentized paper having areas thereof simulating watermarks, comprising the steps of translating paper formed of parchmentizablc fibers and while it is being translated applying to spaced areas thereof a parchmentizing solution of sulfuric acid and after a substantial degree of parchmentizing of the fiber of said areas has resulted but before complete parchmentizing of said areas, submergingly translating the paper through a parchmentizing solution of sulfuric acid, and washing and drying the so parchmentized paper.

3. The method of parchmentizing paper formed'of fibers capable of being parchmentized to produce parchmentized paper having parchmentized areas thereof which visually contrast from other parchmentized areas merging therewith, comprising the steps of applying to such contrasting areas a liquid parchmentizing solution and after there has been a substantial degree of parchmentizing of the fibers in said areas but before the complete parchmentizing of the fibers thereof, subjecting the paper including said partially parchmentized areas to a parchmentizing solution, so that the greater degree of parchmentizing of the areas to which the parchmentizing solution was first applied renders said areas visually contrastable from the surrounding parchmentized areas, and thereafter washing and drying.

4. The method of producing parchmentized paper formed of fibers capable of being parchrnentized and having areas thereof of predetermined design which visually contrast from areas merging therewith, comprising the steps of applying to such contrasting areas a parchmentizing solution, allowing a substantial parchm-entizing action to take place in said areas but before complete parehmentizing of the fibers of said areas subjecting the paper merging with such partially parchmentized areas and said areas to a parchmentizing solution and thereby producing a higher degree of parchmentizing of the areas to which the parchmentizing solution was first applied which results in rendering them visually distinctive from the surrounding portions of the parchrnentized paper, and thereafter washing and drying.

5. The method of producing parchmentized paper having spaced areas thereof simulating watermarks, comprising the steps of translating a web of paper formed of fibers capable of being parchmentized, printing upon the web of paper while it is being translated spaced films of a parchmentizing solution and after substantial parchmentizing action has taken place in said printed area and before the parchmentizing solution applied to said areas has become dry, submergingly translating the web of paper with said partially parchmentized areas through a parchmentizing solution, and washing and drying the parchmentized web as a continuous operation.

6. The method of producing parchmented paper having spaced areas thereof of predetermined design varying in the degree of parchmentizing from areas merging therewith and to such degree as to be visibly distinctive from the areas merging therewith, comprising the steps of translating a web of paper formed of parchmcntizable fiber and while it is being so translated applying a liquid parchmentizing solution to spaced areas thereof, after substantial parchmentizing of the fibers in said areas has taken place and while said areas are wet with the parchmentizing solution applied thereto translating the web of paper including said partially parchmentized areas through a parchmentizing solution, and washing and drying the web of paper as a successive step of a continuous ing therewith and is visually distinctive, and thereafter washing and drying.

8. As an article of manufacture, paper parchmentized throughout and having areas thereof of predetermined design which vary in the degree of parchmentizing from parchmentized areas of the paper merging therewith, the degree of variation in parchmentizing of the design and the areas merging therewith being such that the design areas are visually distinctive from the merging areas.

9. Parchmentized paper parchmentized throughout but having areas thereof of predetermined design which vary in the degree of parchmentizing thereof from the areas merging therewith that such design areas visually contrast from the areas merging therewith. r

10. A parchmentized pap-er sheet parchmentized throughout and having spaced areas thereof of predetermined design parchmentized to a degree substantially differing from the degree of parchmentizing of the surrounding areas whereby such areas are distinctive from the surrounding areas.

References Cited in the file of this patent UNlTED STATES PATENTS a 1,126,783 Kindleberger Feb. 2, 1915 1,924,501 Kelly Aug. 29, 1933 2,002,083 Dreyfus May 21, 1935 2,174,534 1939 Shipp Oct. 3, 

1. THE METHOD OF PRODUCING PARCHMENTIZED PAPER HAVING AREAS THEREOF SIMULATING WATERMARKS, COMPRISING THE STEPS OF TRANSLATING A WEB OF PAPER FORMED OF PARCHMENTIZABLE FIBERS, APPLYING TO SPACED PORTIONS OF THE WEB WHILE IT IS BEING TRANSLATED AND IN A PREDETERMINED DESIGN A PARCHMENTIZING SOLUTION OF SULFURIC ACID OF THE ORDER OF 45* BE. TO 62* BE. AND AFTER SUBSTANTIAL PARCHMENTIZING OF THE FIBERS HAS TAKEN PLACE IN THE AREAS TO WHICH THE PARCHMENTIZING SOLUTION IS APPLIED BUT BEFORE COMPLETE PARCHMENTIZING OF THE FIBERS OF SUCH AREAS, SUBMERGINGLY TRANSLATING THE WEB OF PAPER THROUGH A PARCHMENTIZING SOLUTION OF SULFURIC ACID, AND WASHING AND DRYING THE WEB OF PAPER AS IT IS BEING TRANSLATED. 